package com.hjc.util;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.io.InputStream;

public class MyBatisUtil {
    private  static SqlSessionFactory factory;
    static {    //在静态代码块下，factory只会被创建一次
        try {
            InputStream is = Resources.getResourceAsStream("mybatis-config.xml");
            factory = new SqlSessionFactoryBuilder().build(is);
        }catch (IOException e){
            e.printStackTrace();
        }
    }
    public static SqlSession createSqlSession(){
        return  factory.openSession(false);//true为自动提交事物
    }
    public static void closeSqlSession(SqlSession sqlSession){
        if(null !=sqlSession)
            sqlSession.close();
    }

}
